DATA-BACKED GUIDE · UPDATED JULY 2026
How much does an exhaust repair cost in the UK?
Exhaust costs cover everything from a cheap rear silencer to a full system with a catalytic converter, so the range is enormous. Often only the section that has failed needs replacing, not the whole thing. The real prices below are what drivers actually paid, which helps when a garage quotes for the lot.
The quick version
- Exhausts are usually replaced in sections, so you may only need the part that has failed, not the whole system.
- A rear silencer is a cheap fix; a catalytic converter or DPF is a far bigger one.
- A blowing exhaust is a common MOT failure, so it is worth sorting before the test.
- Fitting is quick where bolts come apart cleanly, but rusted joints add labour.
- Aftermarket exhaust sections are widely available and cost less than OEM on most cars.
What people actually paid
Why the price varies so much
Exhaust prices vary enormously because the system has several parts at very different price points. A back box or a section of pipe is cheap, a mid-section with a flexi joint is more, and a catalytic converter or diesel particulate filter is in another league entirely because of the metals inside. Which part has failed is therefore the biggest factor. Labour depends on how the joints come apart, since seized, rusted bolts can turn a quick job into a slow one. OEM versus aftermarket moves the parts cost, with quality aftermarket sections widely available for less. And a dealer will quote above an independent or exhaust specialist for the same work.
How to pay less
- Get quotes on WhoCanFixMyCar or BookMyGarage, since exhaust prices vary a lot by section and garage.
- Ask whether only the failed section needs doing rather than the whole system.
- Choose a quality aftermarket section over OEM where the garage is happy with it.
- Sort a blowing exhaust before the MOT to avoid a fail and a retest charge.
- Use an exhaust specialist or good independent instead of a main dealer for the labour saving.
Common questions
Do I need to replace the whole exhaust?
Usually not. Exhausts are made in sections, so often only the part that has corroded or split needs replacing, whether that is the back box or a mid-section. Ask the garage to confirm which section has actually failed before agreeing to a full system, which is a much bigger cost.
Will a blowing exhaust fail an MOT?
It can, yes. An exhaust that is leaking, excessively noisy or has a failed catalytic converter is a common MOT failure. If yours has started to blow, it is worth getting it looked at before the test so you are not paying for a fail and then a retest on top.
Why are catalytic converters so expensive?
Because they contain precious metals like platinum and palladium that do the actual work of cleaning the exhaust gases, and those metals are costly. That is also why cats are targeted by thieves. A failed cat is one of the dearer exhaust jobs, so it is worth getting the diagnosis confirmed before replacing it.